AU-X1

[Hyperion]

Will these little tiny ceramic capacitors work in place of those bigger black flags?or did I get the wrong type?View attachment 738328

Is that a C0G/NP0 type ceramic ? - those are the only kind of ceramic capacitor you should be using, if they are it will state this clearly in the description of the part. Standard ceramic is no good as they have poor audio qualities.

However, Silver mica @500V (or as high a voltage as you can get, 500V is common) are a very good alternative as well.

Lots of descriptions of the use of Ceramic C0G/NP0 capacitors spread out over numerous threads check @Leestereo recent threads. Silver Mica were the go-to replacement before the revelations about how good C0G/NP0 are - made by @dr*audio. And then reinforced by @ConradH 3 AK'ers who I follow closely. All of this of course laid on the foundations of work by the one and only @EchoWars, who I have followed from Day1 - and who needs no introduction from me.

 

[Willy6]

That's what

Is that a C0G/NP0 type ceramic ? - those are the only kind of ceramic capacitor you should be using, if they are it will state this clearly in the description of the part. Standard ceramic is no good as they have poor audio qualities.

However, Silver mica @500V (or as high a voltage as you can get, 500V is common) are a very good alternative as well.

Lots of descriptions of the use of Ceramic C0G/NP0 capacitors spread out over numerous threads check @Leestereo recent threads. Silver Mica were the go-to replacement before the revelations about how good C0G/NP0 are - made by @dr*audio. And then reinforced by @ConradH 3 AK'ers who I follow closely. All of this of course laid on the foundations of work by the one and only @EchoWars, who I have followed from Day1 - and who needs no introduction from me.

That's what threw me off was the high voltage range of 500v or higher I was trying to find some closer to the original 125v ones.I'll re order and try to find the right ones this time.

 

[Hyperion]

I used 100v Murata C0G/NP0 Ceramic MLCC

 

[ghamilton]

Why use anything other than silver mica? You may save a little money, but that's the only advantage. I used the best in my 919 because it,s worth it!

 

[Willy6]

I used 100v Murata C0G/NP0 Ceramic MLCC

I thought I could go higher in voltage but not lower?so you're saying I can use 100v caps in place of the original 125v ones?

 

[Hyperion]

Yes certainly, however be aware you can get 50V versions of those Murata's this is too low, best to get 100V or better, check the voltage rating of what you are ordering.

Referring to non-electrolytic capacitors only
You have to think about what is good for capacitor 'stability' (highest voltage rating gives this) and what voltage the capacitor is likely to 'see' in service, 100V rating is satisfactory here, although I would have preferred 200V. So your feeling that you should seek out 125V was absolutely correct, sadly that voltage is a bit unusual, so 100V will do here.

 

[Willy6]

Yes certainly, however be aware you can get 50V versions of those Murata's this is too low, best to get 100V or better, check the voltage rating of what you are ordering.

Referring to non-electrolytic capacitors only
You have to think about what is good for capacitor 'stability' (highest voltage rating gives this) and what voltage the capacitor is likely to 'see' in service, 100V rating is satisfactory here, although I would have preferred 200V. So your feeling that you should seek out 125V was absolutely correct, sadly that voltage is a bit unusual, so 100V will do here.

I searched for the Murata cogs at mouser and most of them are non stocked and 10 weeks out if I order any.

 

[Ronito6]

I searched for the Murata cogs at mouser and most of them are non stocked and 10 weeks out if I order any.

Is it C(zero)G or C(oh)G?

 

[Willy6]

Is it C(zero)G or C(oh)G?

I did c (oh)g but I'm at work doing it from my phone so not as easy as my home pc

 

[Hyperion]

C zero G, and NP zero.

Let me see if I can find you a Mouser link to the series....

This is the series you are looking for - this one is 33pf - get all of them from the same series.
http://www.mouser.co.uk/ProductDetail/Murata-Electronics/RDE5C2A330J0S1H03A/?qs=sGAEpiMZZMsh%2b1woXyUXj6LPjVItmqadMU/YSj5bKgQ=

And a better link to the series...
http://www.mouser.co.uk/Murata/Pass...-bw5t5Zscv7?P=1yx4atuZ1z0zlftZ1yxboka&FS=True

Let me know if you have trouble finding a particular one - and I'll do my best.

 

[Willy6]

C zero G, and NP zero.

Let me see if I can find you a Mouser link to the series....

This is the series you are looking for - this one is 33pf - get all of them from the same series.
http://www.mouser.co.uk/ProductDetail/Murata-Electronics/RDE5C2A330J0S1H03A/?qs=sGAEpiMZZMsh%2b1woXyUXj6LPjVItmqadMU/YSj5bKgQ=

And a better link to the series...
http://www.mouser.co.uk/Murata/Pass...-bw5t5Zscv7?P=1yx4atuZ1z0zlftZ1yxboka&FS=True

Let me know if you have trouble finding a particular one - and I'll do my best.

Is the lead spacing 1.2mm?

 

[Hyperion]

No, for the 33pf linked it is "Lead Spacing: 2.5 mm"

Use the second, lower link, the first wasn't ideal.

 

[Willy6]

No, for the 33pf linked it is "Lead Spacing: 2.5 mm"

Use the second, lower link, the first wasn't ideal.

Ok I found the RDE series thank you for your input and you use nichicon gold for the signal path electrolytic's right?

 

[Willy6]

No, for the 33pf linked it is "Lead Spacing: 2.5 mm"

Use the second, lower link, the first wasn't ideal.

Some of the values I need are 17pf but they don't have that should I use a 10pf and 7pf or just put in an 18pf that they do have?

 

[Ronito6]

18pf is fine

 

[Willy6]

As far as electrolytic's I like nichicon kz series anyone's opinion is greatly appreciated

 

[Ronito6]

KZ is also fine.

To simplify everything and to lower cost with no compromise in quality...
for the electrolytics use only Nichicon FG on the whole thing,
except the 25V4700 on the power protection board and the bipolars.

Naturally the 80V 10,000 filter caps are another issue completely.

This site http://amp8.com/sansui/x-xx/x-xx.htm has tons of pictures to reference. (Its all in Japanese but the pics are great.)

His latest restoration from 2015 of an X11 here (very close to an X1) here http://amp8.com/sansui/x-xx/x11/au-x11-5.htm
he uses FG for 99% of the replacements. (He uses a few KZ only on the equalizer cards and the power regulation board.)

 

[Willy6]

KZ is also fine.

To simplify everything and to lower cost with no compromise in quality...
for the electrolytics use only Nichicon FG on the whole thing,
except the 25V4700 on the power protection board and the bipolars.

Naturally the filter caps are another issue completely.

This site http://amp8.com/sansui/x-xx/x-xx.htm has tons of pictures to reference. (Its all in Japanese but the pics are great.)

His latest restoration from 2015 of an X11 here (very close to an X1) here http://amp8.com/sansui/x-xx/x11/au-x11-5.htm
he uses FG for 99% of the replacements. (He uses a few KZ only on the equalizer cards and the power regulation the fg series prabably offers more values I think as the kz was limited when I searched

 

[Willy6]

OK

 

[Willy6]

OK

My ears will be the test on different capacitors I guess?